Leather-working machine.



No. 682,803. Patented sept. I7, Ism.

H. B. MALDEIS.

LEATHER WURKING` MACHINE.

(Application led In'. 22,A 1901.) (nu Model.) 5 sheefbshaf 1.

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No. 682,803. Patented sept. I7, wol. H. MALnEls.

LEATHER WORKING MACHINE.l v

(Application led Mar. 22, 1901.)

(No Model.)

5 Sheets-Shed 2.

I Eta- QMWQQ @y @Qiforneys I N0. 682,803. Pafntd Sept. I7, QOI. H, B.MALDEIS.

LEATHER WORKING MAGHINE..`

(Applicaion led Mar. 22, 1901.),

s sheets-sheet 3.

(No Model.)

Wimesses 1 Patented Sept. I7, |90I. H. B. MALDEIS. v

(No Model.)

Y @Qttorneys Tm; Nonms mins co.. mqfourno.. WASHINGTON, u

No. 682,803. Patented Sept.' I7, |901. H. B. MALDEIS. LEATHER WORKINGMACHINE.`

(Application lsd Har. 22, 1901.)

5 Sheets-Sheet 5.

(la Modal.)l

@Miorneys m: Norms PETER: ca.. PHOTO-LINO.. WASHINGTON. D. c.

UN-HBD* STATE-s PATENT (Diarios.k

HENRY BRUNO MAL'DEIS, OF MONTREAL, CANADA.

LEATHER-WORKING MACHINE.'

SPECIFICATION forming part of Letters Patent No. 682,803, datedSeptember 17, 1901. Application iiled March 22, 1901. Serial No. 52,303.(Nomodel.)

To all whom t may concern,.-

. Be it known that I, HENRY BRUNO MALDEIs, a citizen of the UnitedStates of America, residing in the city and district of Montreal,Province of Quebec, Canada, have invented certain new and usefulImprovements in Leather- Working Machines; and I do hereby declare thatthe following is a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to improvements in leather-Working machines; andthe primary object in View is to cut, crease, raise, and skivevleatherall at one and the saine operation for the production of leatherarticlessuch as back-straps, breeching or breast-collar layers, and anyscalloped or wavy strap that may be desired in harness or for other`leather goods.

A further object is to equip the machine with means for firmly clampingthe Work in place against slipping or displacement during the operationot' trimming and skiving the same and at the same time to raise andcrease the work, to make the skiving devices serve as work-pressuredevices during reversal of the cutter-carriage, to control the cuttingor trimming knives, so as to accurately follow the contour of thepattern, and to enable all of the knives and the pressure mechanism toeasily be thrown out of operative relation to the combined pattern andmold.

Withy these ends in view the invention consists in the novelcombinat-ion of mechan.

isms and in the construction and arrangement of parts for service, aswill be hereinafter fully describedl and claimed.

In the drawings hereto annexed, forming a part of this specification,Figure l is a side elevation of a leather-working machine constructed inaccordance with my invention. Fig. 2 is a plan View, on an enlargedscale, with the framework and other parts broken away. Fig. 3 is a sideelevation, partly in section, of the machine in its broken-awaycondition represented by Fig. 2. Fig. 4 is a vertical cross-section inthe plane of the dotted line 4 4 on Fig. l looking in the direction ofthe arrow and showing the cutter-carriage and the devices thereon inelevation. Fig. 5 is a vertical cross-section in the plane of the dottedline 5 5 on Fig. 2 looking in the direction of the arrow andrepresenting the cutter-carriage and its associated parts in section andcertain other devices in elevation. Fig. 6 is a detail perspective viewof the cutter-carriageremoved from the machine. Figs. 7 and 8 areenlarged views, partly in elevation and partly in section, through aknifecarrier and presser for the skiving-knife, Fig. 7 showing theoperative position' of the knife in skiving the leather and Fig. 8representing the inoperative positionv of the knife and the operativerelation ofthe knife-carrier to the work to serve as a presser therefor.Fig. 9 is a detail perspective view of one cutting or trimming knife andthe parts associated therewith. Fig. 10 is a detail perspective view ofthe knife-block adapted to carry the devices shown by Fig. 9. Fig. 11 isa plan View of the combined pattern and mold. Fig. 12 is a detailperspective view of the coupling-bar adapted to unite one pair ofpresserbars and to support a presser-roll and a knifecarrier and presserfor one of the skivingknives. Fig. 13 is a perspective view of theknife-carrier and presser, the same adapted to support theskiving-knife. Fig. 14 is a detail plan view of the means for adjustingone of the cutting-knife blocks. Fig. 15 is a' detail cross-sectionthrough the on the line 15 15 of Fig. l1.

ssv

pattern-mold d The same numerals of reference denote like I partsin eachof the several figures of the drawings. y

The general framework of my improved machine consists of the endsections 10 10a, having the legs 11 and united together by thelongitudinal side rails 12 12a, all of these parts being of any usual orpreferred construction.

13 designates a horizontal supporting-bar, which is arranged to extendfrom end-tor' end ofthe frameandlies in a central position between theside l'rails 12 12a and preferably above the horizontal plane of theguides 14, which are provided for` the accommodation of the slidablecutter-carriage 15. The guides 14 are formed, preferably, by ribsproduced on the inner opposing faces of the side rails l2 12a, said`ribs extending inwardly toward each other, as more clearly shown byFigs. 4 and 5, and said ribs or guides extend practically the fulllength'of the machine, whereby IOO the cutter-carriage is adapted totraverse the machine-frame for the full length of the combined patternand mold 16, the latter being represented in position within the frameby Figs. 1, 3, 4, and 5 and in detail by Fig. 11. The combined patternand mold 16 is arranged to rest solidly upon the top edge of thehorizontal supporting-bar 13, and said patternmold may extend fromonelend of the frame to the other, as shown by Fig. 1, or it may be ofany appropriate length, according to the character of the article itisto fashion. The end portions of this pattern-mold are fastened to thesupporting-bar by screws, as at 17, thus removably mounting thepattern-mold in a solid substantial way upon a permanent part of themachine. It is preferable to make the supporting-bar 13 of lesscross-sectional dimensions than the pattern-mold, as shown by Figs. 4and 5. The pattern-mold 16 has three active faces, two of which areformed by the wavy or scalloped edges 18 19, and the remaining activesurface is produced by the depressions 2O 21 22, which are produced inthe upper surface of said pattern-mold. The wavy faces 18 19 on theedges of the mold may be varied according to the desired configurationsof the work, and these edges produce the pattern-surfaces of the element16. The depressions 2O 2l 22 may be arranged so as to make thedepression 2O somewhat wider than the otherdepressions 21 22; but ofcourse the contour of these depressions may be varied within widelimits. A single depression or any combination of depressions may beproduced in the upper surface of the element 16, and this depression ordepressions form the matrix or mold surface of said element 16.

From the foregoing description it will be understood` that I use theexpression pattern-mold because the element 16 is provided with bothpattern and mold surfaces, which, however, are readily distinguishablebecause they perform separate mechanical functions in connection withother operating elements of the machine.

In the production of a machine wherein a series of operations areperformed simultaneously on a piece of leather one problem is theprovision of means by which the leather may be held firmly in placeagainst any tendency to slip and at the same time be forced into thematrix-surface of the pattern-mold, and, furthermore, exposed to theaction of the cutting-knives and the skiving-knives. This object isaccomplished in my machine by the provision of a thin pressure-bar 23,the same being coextensive in length with the patternlnold or with themachine. This pressurebar is arranged centrally with relation to thematrix-surface of the pattern-mold, and said baris carried byvertically-movable adjusting devices, which are limited to movement in avertical path and which operate under all conditions to maintainparallelism between said thin pressure-bar and the pattern-mold. Saidpressure-bar is received in the recess 24 of the head 25, the partsbeing secured rmly Together by suitable screws, and this head 25 isfurnished at its ends with the vertical guides 26, the latter beingslidably fitted upon the vertical guide-posts 27,which are fastened tothe end sections lO 10 of the machineframe. As shown by Fig. 3, theseposts are threaded at their lower portions into the end sections of theframe, and t-hc upper portion of each post has an external screw-thread28. The guides 26 of the head 25 loosely receive the fixed posts,whichgive the desired vertical direction to the head, and this head is formedat its end portions with the jaws 29, the same extending upwardly fromthe head and providing recesses or spaces 30, in which recesses arefitted the sprocket-gears 31 32, the same having screw-threadedopeningsin their hubs, whereby the sprocket-gears may be screwed uponthe threaded lengths 28 of the fixed posts 27, and said sprocket-gearsare loosely mounted in the jaws of the head.

33 designates a master-sprocket, which is arranged in the samehorizontal plane as the sprocket-nuts 31 32, and this master-sprocket 33lies, preferably,about midway between the sprocket-nuts. Thismaster-sprocket 33 and the sprocket-nuts 3l 32 are operatively connectedtogether by an intermediate sprocketchain 34, which is engaged with thesprocketnuts and with said master-sprocket for the purpose oftransmitting the motion of the latter to the sprocket-nuts andsimultaneously rotate said sprocket-nuts in the required directions forthe purpose of raising and lowering the head 25 and Jthe pressure-bar23. This master-sprocket is idly mounted on a journalstud 35, whichextends upwardly from a dovetailed slide 36, the latter being receivedin a corresponding guideway 37, which is provided in the upper face of abracket 38, said bracket being firmly and solidly bolted to the head 25at or about the middle thereof and extending toward the front side ofthe machine, as more clearly shown by Figs. 2, 4, and 5. This dovetailedslide may be adjusted in the bracket so as to shift the m ester-sprocketin a direction to serve as a tightener for the endless sprocket-chain34, and said slide is clamped firmly in place by means of a clamping-nut39, the same being screwed upon a threaded depending stud 40 of theslide 36, said stud arranged to travel or move in a slot 41 of thebracket 38, (see Fig. 5,) whereby the nut 39 may be tightened againstthe underside of the bracket, so as to firmly hold the slide and themaster-sprocket in their adjusted positions. The mastersprocket may beprovided with a suitable operating-crank 33, whereby it may be turned byhand.

The cutter-carriage 15 is provided in its ends with the horizontalgrooves 42, which loosely receive the ribs or ways 14 on the oppositeside rails of the framework, said cutter-carriage extending between therails, and thereby slidably mounted upon the frame- IOO IIO

work, so as to be capable of a traversing movenient in a rectilinearpathand longitudinally of the machine. This traversing movement of thecutter-carriage is imparted positively thereto by the agency of aworm-shaft 43, the same being arranged in a horizontal positioncentrally of the frame and extending throughout the full length thereof.The end portions of this shaft are smooth and plain, so that it may bejournaled in proper bearings in the end sections of the framework, asindicated by dotted lines in Fig. 1; but the shaft is provided vvith acontinuous thread between its bearings. The cutter-carriage is formedwith a female threaded central passage 44, (see Fig. 6,) through whichpasses the shaft 43, the thread of which engages with the thread of thepassage 44, whereby the carriage is operatively connected to the shaftfor the former to be positively moved along the guideways by the motionof said shaft. As shown by Figs. 4 and 5, the Worm-shaft is in thevertical plane of the pressure-bar 23, and hence occupies a centralrelation to the cutter-carria-ge. This shaft may be driven in anysuitable direction from a main'driving-shaft 45, the latter having asuitable pulley 46, which isV driven by a belt 47 from any source ofpower. As shown, this shaft has the pulleys 48 4S arranged in alinementwith other pulleys 49 49, the latter being mounted on the end portionsof the worm-shaft 43 and adapted to be individually made fast therewiththrough the agency ot' suitable clutches 50 50, each clutch beingcontrolled by a lever 51. The pulleys 48 49 are connected by a straightbelt 52, while the other pair of pulleys 4S 49 are connected by thecrossed belt 53. (See Fig. 1.) It is evident that the engagement of thepulley 49 by the clutch 50 with the worm-shaft will operate to drive thelatter in one direction, and consequently propel the carriage in onedirection along the pattern-mold; but when the pulley 49 is disengagedand the pulley 49L is made fast by the clutch 50a with the worm-shaftthe latter will be driven by the crossed belt 53 in the oppositedirection, so as to propel the cuttercarriage also in an oppositedirection.

I will now proceed to describe the cutting or trimming knives, which arecontrollable by the pattern-faces 18 19.01:v the pattern-mold and arearranged to cut the edges of the leather on wavy or irregular linesconforming to said pattern-surfaces of the mold.

VThe slidable carriage 15 is provided on opposite sides of its threadedopening 44 with the vertical slots 54, in which are loosely fitted theknife-blocks 55 56, the same being supported on opposite sides of thesupporting-bar 13 and of the pattern-mold, said knifeblocks beingcapable ofa .limited slidable .movementin the slotsx .54 ofk thecarriage,

whereby said knife-blocks are mounted in the carriage, so as to partakeof the traversing movement thereof, and they are adjustable inA saidslots 54 independently of said movement of the carriage. Theknife-blocks are provided at their upper ends with the enlarged heads57,which heads rest upon the carriage, while to the lower ends of theknifeblocks are secured the removable plates 58, whereby theknife-blocks are removably and slidably confined in said carriage. Theknifeblocks are provided with the sockets 59 in the enlarged headsthereof, in which sockets are secured the guide-stems 60, the same beingarranged on opposite sides of the bar 13 and extending outwardlytherefrom. (See Fig.5.) These stems are rmly attached to the heads ofthe knife-blocks, so as to be movable therewith, and the outer ends ofthe stems are slidably fitted in the tubular guides 61, the same beingexternally threaded and screwed into threaded openings which areprovided in the upstanding lugs 62 on opposite sides of the carriage.The stems support the pressure-springs 64, which are coiled loosely f onthe stems and are arrangedto have their inner ends bear against theheads 57 within the sockets 59 thereof, the other endof'said springs 64being seated against the tubular and adjustable guides 6l. The energy ofthese springs is exerted against the knife-blocks, so as to press thelatter normally toward each other and toward the supporting-bar, thetension of each spring being regulatable by rotary adj ustment of theguide 6l, against which is seated the outer end of said spring.

Upon the heads 57 of the two knife-blocks are loose1T mounted therocking knife-snpports 65 66, the same being disposed on opposite sidesof the pattern-mold and contiguous to the exposed pattern-surfacesthereof. Each rocking knife-support is preferablyembodied in the form ofa disk, which is centrally pivoted on a pin 67, which extends\upwardlyfrom the knife-block head. (See Fig.,V 9.) Said support or disk isprovided with a at face, to which is secured one of the upstandingcutting or trimming knives 69 70.4 The ICO IIO

cutting-knife is a long blade sharpened at one e edge and at its lowerendattached firmly to a rocking support, the axis of which isparallelwith that of the pattern-mold, and these cutting-knives are carried bythe carriage along and in exceedingly close relation'to thepattern-surfaces of the pattern-mold, as represented more clearly byFig. 1. The cutting-knives are caused to travel in paths correspondingto the pattern-surfaces 18 19 by the action of controllers and springs.rocking support has a controller 71 fastened thereto, said controllerbeing in the form of a plate of spring metal, which is bent to partiallyencircle the disk or support, the free Each end of said controller beingarranged well in Y advance of the support and adapted to rideagainst'one of the pattern-surfaces. The controller is held Iyieldablyin contact with the pattern-mold by the action of a coiled' spring 72,which is secured at one end to the head ofrone knife, While its, otherend is fastened to the disk'or support for the knife. The

spring normally turns the knife-supper direction to press the controlleragainst the pattern-mold and to make the active edge of the knife outthrough the work which may be exposed beyond the pattern-surface of thepattern-mold,and the controller ridingagainst said pattern-surfaceautomatically imparts the desired rocking movement of the knifesupport,so as to make the knife cut leather on lines conforming to the patternmold, whereby the wavy appearance may be given to the leather.

The knife-blocks 55,which are held normally in their working positionsby the springs 64:, may be retracted by means of the levers 73, whichare disposed on opposite sides of the machine and are provided with thecamshaped heads 74. (Indicated partly by dotted lines in Fig. 2.) Saidlevers are pivotallyconneeted at 75 to the outer ends of the rods 76,the latter being individually secured to the knife-blocks 55 56 andextending slidably through the carriage, whereby the rods are mounted inthe carriage, and the levers are arranged for their cam-shaped heads 74:to bear against the ends of the carriage. It is evident that eitherlever may be shifted so as to draw the knife-block away from thepattern-mold and against the tension of the spring 64:.

l will now proceed to describe the means by which the skiving of theleather is eiected and vertical pressure is given to the work on thetraversing movement of the carriage for the purpose of supplementing thepressure exerted by the pressure-bar 23, whereby the Work is forced intothe matrix-surface of the pattern-mold for the purpose of making one lface of the leather partake of or conform to the matrix-surface.

77 77a designate one paix` of pressure-bars, which are mountedvertically and slidably in suitable openings 7S of the carriage,andthereby disposed on one side of the pattern-mold. 79 79n designate alike pair of vertical pressurebars,which are slidably mounted inopenings 8O of the carriage, and thereby disposed on the opposite sideof said pattern-mold, whereby the two pairs of pressure-bars are mountedindividually in the carriage, so as to partake 0f the traversingmovement thereof, and at the same time said bars are capable ofindependent vertical movement under the action of the springs Sl 82. Onespring is fitted on each pressure-bar, and the upper end of said springis seated against the under side of the carriage. The lower ends ofthesprings Sl on the bars 77 77a are seated on the nuts 83, which arescrewed on the threaded lower ends of said bars, and the springs S2 ofthe other set of bars 79 79n are seated on similar nuts S4, the latterbeing screwed on the lower p0rtions of said pressure-bars,whereby'either nut may be adjusted so as to regulate the tension of itscorresponding spring. The lower ends of the pairs of pressure-bars areconnected by the cross-plates S5, each pai r of bars t in a l beingconnected individually by one of said plates, the same being held inplace by the nuts S6. These plates are arranged to engage with theeccentrics S7, which are made fast with the rock-shaft 8S, the latterextending between the pair of pressure-bars and arranged below thecarriage so as to be journaled in suitable bearings provided in thedepending lugs 89 on the slides of the slidable carriage, saidrock-shaft being mounted to travel with the carriage and arranged in ahorizontal plane below the lower edges of the side rails 12 12, wherebythe rock-shaft may move with the carriage without obstruction from theframework. This rock-shaft ex'- tends across the framework, so as tohave one end thereof project beyond one side of said framework,preferably the front thereof, and to said end of the shaft is securedthe handle 90. In the normal active position of the parts the springsforce the pressure-bars in a downward direction and the cross-plates arekept in engagement with the eccentrics of the rock-shaft. By turning thehandle 90 in one direction the shaft is rocked so as to present theeccentrics S7 in positions which will allow the springs to raise theconnectingplates, and this adjustment permits the pressu re-bars torelease the skiving-knives and the rollers 92 93 from the work on thepatternmold.

The upper ends of the pairs of pressurebars are connected individuallyby the coupling-plates 94:, each of which is provided with the sleeves95 at the ends thereof, the sleeves of one coupling-plate being fittedto the pressure-bars of one pair and held firmly thereon by theclamping-screws 9G. The couplingplate of each pair of pressure-bars isfurthermore provided with the journal-studs 97 98, the same being castas an integral part of the plate and disposed at opposite ends thereofand in positions at right angles to the length of the plate. Thecoupling-plates of the two pairs of pressure-bars are arranged onopposite sides of the pattern-mold and in positions parallel with thelongitudinal axis thereof, whereby the journal-studs are arranged toextend inwardly toward the pattern-mold for the purpose of supportingthe pair of pressure-rolls 92 93 and the pair of knife carriers andpressers 99 100. The pressureroll 93 is loosely mounted on thejournal-stud 98 of the coupling-plate for the pair of pressure-bars 7777, while the knife carrier and presser 99 is loosely mounted on thejournalstud 97 of the same coupling-plate, whereby the parts 93 99 aremounted one in rear of the other on the coupling-plate of one pair ofbars, so as to be disposed on one side of the thin pressure-bar 23. Theother pressureroll 92 is journaled on the stud 97 of the coupling-platefor the pair of bars 79 79a, and the knife carrier and presser 100 ispivotally or loosely mounted on the stud 97 of the same coupling-plate,whereby the parts 92 100 are mounted on one pair of pressure-bars, so asIOO IIO

to lie partly over the matrix-surface of the pattern-mold and on theopposite side of the pressure-bar 23 from theV first-described elements93 97. From this description it will be understood that thepressure-rolls 92 93 are operatively presented under yielding pressureto the work on the matrix-surfaces of the pattern-mold, whereby theyassist the pressure-bar 23 in forcing the work into said matrix-surface,so as to give the desired conp tour and finish to one face of theleatherstrap or work.

The skiving-knives, which serve to reduce the leather to the requiredthickness in a` manner well understood by those skilled in the art, areindicated by the numerals 101 102, the same being mounted in theknifecarriers 99 100, respectively. One of these knife-carriers and theskiving-knife therein is shown in detail by-Figs. 7, 8, and 13 of thedrawings, said Figs. '.7 and 8 representing the operative andinoperative positions of said knife. The knife-carrier is cast in asingle piece of metal in hollow form, the same comprisin g parallelplates andthe transverse web, and between these plates is arranged theknife which finds a solid bearing upon the web, to which said knife issecured by screws, all clearly shown by said Figs. 7 and 8. The webofthe knife-carrier is provided with .a curved surface 103, disposed ineccentric relation to the axis of oscillation of the knifecarrier whichis afforded by one of the journal-studs of one coupling-plate, and thesharpened operative end of the skiving-knife is arranged to projectbeyond the edge of the web and in advanceof the eccentric surface 103.Each knife-carrier isfashionedto present a narrow front end and a broadrear end, and on this narrow front end is arranged a rollershoe 104, thesame being idly mounted on a suitable pin 105 and having its surface eX-posed beyond the knife-carrier, so that it will ride upon the work whensaid knife-carrier and the skiving-knife are adjusted to their operativepositions, as shown by Fig. 7. When the carriage is traversing in thedirection indicated by the arrow in Figs. 2, 3, and 7, theknife-carriers 99 100 are arranged to have their front endslowered, sothat the roller-shoes 104: will press upon the work in advance of theskiving-knives, and thereby prevent said knives from penetrating too farinto the work. During the travel of the carriage and the knives in thisdirection said knives penetrate and skive the leather, as represented byFig. 7; but when the carriage and the mechanisms mounted thereon travelin the opposite direction the knife-carriers 99 100 are automaticallythrown by frictional contact with the workV into the inoperativeposition of Fig. 8, whereby the surfaces 103 are brought below the knifecarrier pivots and are made to ride upon the work with considerableforce, whereby the surfaces 103 constitute presser devices, so as toassist the rollers 92 93 in making the bottom surface of The operationof my invention may be del scribed as follows: Assuming that thecutter-carriage is at the left-hand end of the machine shown by Fig. 1,that the slidable head 25 andthe pressure-bar 23 are raised a suitabledistance, that a proper pattern-mold is in operative position on thesupporting-bar 13, and that the several cutter and pressure devices arein their retracted positions, the

operator proceeds to first adjust the work byV placing the same in asmooth condition upon the matrix-surface ofthe pattern-mold. Themaster-sprocket 33 is now rotated so as to give proper motion to thesprocket-chain and to the sprocket-nuts for the purpose of low-` eringthe head 25, and thereby making the thin pressure-bar 23 engagecentrally with the work and throughout the length of the pattern-mold.The shaft 8S is now rocked so that the sprin gs will depress thepressurebars, and thereby make the latter present the pressure-rolls 9293 and the knife carriers and pressers 99 100 in operative position tobear upon the top surface of the work on the pattern-mold. The levers 73are released for the springs 64 to press the trimming-knives inwardlytoward the pattern-mold for the controllers 7l to ride against thepattern-surfaces thereof. All the parts having now been adjusted totheir operative positions, the worm-shaft 43 is driven so as to propelthe ICO carriage in the direction indicated by the arrows, or from leftto right on Figs. 1, v2, 3, and 7 of the drawings. During this movementof the carriage the pressure-rolls 92 93 coact with the pressure-bar 23and force the work upon the matrix-surface of the patternmold. Theknife-carriers 99 100 present the two skiving-knives in position forskivin g the work and reducing it to the required thickness, and thecontrollers 7l are held in engagement with the pattern-mold, so as toshift the position of the cutting or trimming knives 69 70 and make themcut the edges of the work on both sides of the pattern-mold and on wavyor other lines corresponding to the contour of the pattern-surfaces. Theca rriage having traversed the required length of the pattern-mold andthe work thereon having been simultaneously cut or trim-med. skived, andpressed, so as to make it present the desired ornamental appearance, thecarriage is arrested at or near the right hand end of the frame, thedirection of rotation of the worm-shaft 48 is reversed, and the carriageis positively driven or moved in an opposite or backward direction, asindicated by the arrow in Fig. 8. During this reverse travel of the'carriage the knife-carriers 99 100 are reversed to the positionsindicated by Fig. 8, wherein the eccentric surfaces 103 are made to rideupon the top surface of the work which was previously skived by theaction of the knives, thus making said surfaces of the carriers 99 100act as pressers to assist the rolls 92 93 and the pressure-bar 28 inforcing the leather upon the matrix-surface of the pattern mold.Furthermore, during this backward travel of the carriage the cutting ortrimming knives 69 70 move idly past the pattern-mold, and theskiving-knives are, as will readily be apparent, thrown to theirinoperative positions. When the carriage completes its backward traversethe operator again turns the master-sprocket 33, but in a direction toelevate the head 25 and the pressure-bar 23, thereby withdrawing thelatter from the work and releasingr the same, so as to facilitate itsremoval from the machine, the pressure-rolls 92 93 being also releasedby proper manipulation of the rock-shaft 8S. A

' new piece of leather is now placed upon the pattern-mold, clamped asbefore, and the operations are repeated.

Changes within the scope of the appended claims maybe made in the formand proportion of some of the parts while their essential features areretained and the spirit of the invention is embodied. Hence I do notdesire to be limited to the precise form of all the parts as shown,reserving the right to vary therefrom.

Having thus described my invention, what I claim as new isl. In aleather-working machine, the combination of a pattern-mold provided withpattern-surfaces and a matrix-surface, a Workclamp of less width thanthe matrix-surface of the pattern-mold and disposed in coperativerelation thereto, a traversing cutter-carriage, and cutter devicesmounted on said carriage in active relation to the pattern and matrixsurfaces of said pattern-mold, substantially as set fort-l1.

2. In a leather-working machine, the combination of a pattern-moldprovided with a matrix-surface and with one or more lateralpattern-surfaces, a work-clamp comprising a thin bar arrangedlongitudinally and centrally with respect to said pattern-mold and incoperative relation to the matrix-surface thereof, means whereby saidwork-clamp may be adjusted in parallel relation with respect to saidpattern-mold, a cutter-carriage,-and cutter devices mounted on saidcarriage in active relation to said pattern-mold, substantially as setforth.

3. In a leather-working machine, the cornbination of a pattern-moldprovided with a matrix-surface and with pattern-surfaces, a

thin pressure-bar in operative relation to the matrix-surface anddisposed longitudinally and centrally with respect to said patternmold,means for adjusting said pressure-bar toward or from the pattern-mold, acuttercarriage, and cutterdevices mounted on said carriage in coperativerelation to the pattern-mold, substantially as set forth.

t. In a leather-working machine, the combination of a pattern-mold, aslidable head movable relatively to said mold, a pressurebar carried bysaid head and disposed centrally with respect to said patternmold,guideposts on which the head is slidably mounted, an adjusting mechanismhaving devices engaging with said posts and movable with said head, acutter-carriage, and cutter devices mounted on the carriage incoperative relation to the pattern-mold, substantially as set forth.

5. In a leather-working machine, the combination of a pattern-mold,stationary guideposts, a head slidable on said posts and carrying apressure-bar which is disposed in cooperative relation to the mold, nutshaving threaded engagement with said posts and loosely confined on thehead, a driving element operatively connected with said nuts andsupported on the head, a cutter-carriage, and cutter devices mounted onthe carriage in coperative relation to the pattern-mold, substantiallyas set forth.

6. In a leather-Working machine, the combination of a screw-shaft, aslidable cuttercarriage engaging with said screw-shaft, a pattern-moldin fixed relation to the cuttercarriage, a Work-clamp,cutting-knivesmounted on the work-carriage and controllable by the pattern-mold, andskivingknives also mounted on the work-carriage and arranged to rideupon work conned on said patternmold, substantially as set forth.

7. In a leather-working machine, the combination of a pattern-moldprovided with a matrix-surface and with pattern-surfaces, acutter-carriage arranged to traverse the pattern mold, a Work clamp,cutting -knives mounted on the carriage and controllable by thepattern-surfaces of the pattern-mold, and a skiving-knife movable withthe carriage and presented in coperative relation to the matrix-surfaceof the mold, substantially as set forth.

8. In a leather-working machine, the combination of a pattern-moldhaving matrix and pattern surfaces,means for clam ping the work uponsaid matrix-surfaces, a cutter-carriage, skiving-knives mounted on thecarriage, pressure devices also mounted on the carriage and arranged toforce the Work upon the matrixsurface of the pattern-mold, andcuttingknives supported by the carriage and controllable by thepattern-surfaces ot said pattern-mold, substantially as set forth.

9. In a leather-Working machine, the combination of a pattern-mold, aclamping-bar of less width than the pattern-mold and disposed IOO IOS

IIO

in longitudinal cooperative relation thereto, a cutter-carriage,pressure devices supported on the carriage and arranged on oppositesides of the clamping-bar and adapted to traverse Work on saidpattern-mold,and skiving-knives also mounted on the carriage incoperative relation to work on the mold, substantially as described.

l0. In a leather-working machine, the combination of a pattern-mold, acutter-carriage, a pressure device supported by the carriage and mountedto traverse the mold, means for yieldably holding said pressure devicesin their operative relation to the mold, knifecarriers also yieldablymounted on the carriage and arranged to traverse the mold, and means forpresenting the knife-carriers toward the mold, substantially asdescribed.

11. In a leather-working machine, the combination of a pattern-mold, aclamping-bar disposed in cooperative relation to a matrixsurface of saidpatternimold,a cutter-carriage,

pressure devices mounted on said carriage and disposed on opposite sidesof the clampingbar, skiving-knives also mounted on the carriage andarranged on opposite sides of the clamping-bar, `means whereby saiddevices are held in operative positions, and means for moving saiddevices away from the mold, sul)- stantially as described.

12. In a leather-working machine, the combination of a pattern-mold, acutter-carriage, pressure-rolls on said cutter-carriage, pivotedskiving-knives movable with the carriage and operable independently ofthe pressure-rolls, and means whereby said devices are kept in .theiroperative positions, substantially as described.

13. In a leather-working machine, the combination of a pattern-mold, athin pressurebar disposed in coperative relation to the matrix-surfacesof the pattern-mold, pressure devices mounted on the carriage anddisposed on the opposite sides of the pressure-bar and in coperativerelation to the mold, and skiving-knives also mounted on the carriageand on opposite sides of the pressure-bar, substantially as described.

14. In a leather-Working machine, the combination of a pattern-mold, acutter-carriage, a pressure-bar opposite to the pattern-mold, pressuredevices yieldably mounted on the carriage and disposed to traverse themold in close relation to said pressure-bar, and skiving-knivespivotally and yieldably mounted on the carriage and disposed in a likerelation to the pattern-mold and to the pressure-bar, substantially asdescribed.

15. In a leather-Working machine, the combination of a pattern-mold, acutter-carriage capable of a traversing movement relative to thepattern-mold, a pivotedl knife-carrier disposed on said cutter-carriagein coperative relation to the pattern-mold and provided with apressure-surface which is eccentric to the pivot of the knife-carrier, askiving-knife supported in the knife-carrier and projecting beyond theeccentric pressure-surface thereof, and means for imparting a traversingmovement to the cutter-carriage andv the knife-carrier mounted thereon,whereby the skiving-knife is presented'in operative position on themovement of the cutter-carriage in one direction and on the oppositemovement of the cutter-carriage saidknife-carrier is automaticallyturned on its pivot audits presser-surface is arranged to act upon andto traverse the Work, substantially as described.

16. In aleather-Working machine, the combination with a mold, and acuttercarriage,

of a rocking knife-carrier pivotally mounted on said carriage to have afree and unrestrained movement thereon, said knife-carrier provided witha curved presser-surface which lies eccentric to the axis of motion ofsaid carrier, and a skiving-knife attached to the carrier and projectingbeyond' the curved presser-surface thereof, as and for the purposesdescribed.

17. In a leather-Working machine, the combination with a pattern-mold,and a traversing carriage, of a rocking knife-carrier pivotallymountedon the carriage and provided with a curved presser-surface arrangedeccentric to the axis of vibration of theknifecarrier, saidpresser-surface being opposite and in cooperative relation to amatrix-sur# face of the pattern-mold, a roller-shoe mounted on theknife-carrier beyond the front end of the eccentric surface thereof, anda skiving-knife attached to the knife-carrier and exposed between theroller shoe and the presser-surface, the parts arranged to operatesubstantially as set forth. Y

18. In a leather-Working machine, the combination with a pattern-mold,and a traversing carriage, of spring-actuated pressure-bars mounted inthe carriage, pressure devices mounted on the pressure-bars, andknife-carriers also mounted on the pressure-bars, and means for givingadjustment to said pressurebars at different points of traverse of saidcarriage, substantially as described.

19. In a leather-working machine, the com-v bination With apattern-mold, and a traversing carriage, of pressure-bars mounted in thecarriage and connected in pairs, a pressureroll and a skiving-knifeindividually mounted on one pair of pressure-bars and disposed incoperative relation to said patternrmold, means for yieldably actuatingsaid pressurebars to hold the pressure-rolls and skivingknives inoperative position, and a rocking shaft mounted on the carriage andhaving means for moving said pressure-bars, substantially as described.

20. In a leather-Working machine, the combination with a pattern-mold,and a cuttercarriage, of slidable knife-blocks conned on the carriageand normally held in close relation to the pattern-mold, andcutting-knives yieldably supported on said knife-blocks and IIO providedwith controllers which are in operative relation to the pattern-surfacesof said pattern-mold, substantially as described.

2l. In a leather-Working machine, thc combination with a traversingcarriage, of a pattern-mold having lateral pattern-surfaces, rockingknife-supports mounted on said carriage contiguous to thepattern-surfaces of said pattern-mold, cutting-knives carried by theknife-supports, and controllers engaging with the pattern-surfaces andoperatively connected to the rocking knife-supports for antomaticallycontrolling the positions of the cutting-knives, substantially asdescribed.

22. In a leather-Working machine, the combination of a pattern-moldhaving lateral pattern-surfaces and a matrix-surface on its upper side,a traversing carriage, knife-supports slidably mounted on said carriagein the horizontal plane of the pattern-mold and having means arranged toride against the pattern-surfaces thereof, cutting-knives carried bysaid knifesupports and presented thereby in cooperative relation to thepattern-surfaces of said pattern-mold, a longitudinal clamp cooperatingwith the matrixsurface of the pattern-mold, and skivingknives mounted onthe cutter-carriage and disposed on opposite sides of the longitudinalclamp, substantially as and for the purposes set forth.

23. In a leather-working machine, the combination of a pattern-moldhaving lateral pattern-surfaces, a traversing carriage, knifesupportspivotally mounted on the carriage and provided With upstanding kniveswhich are disposed on opposite sides of the patternmold and close to thepattern-surfaces thereof, controllers projecting from the knife-supportsand arranged to ride against the pattern-surfaces, and retractors forholding the knife-supports and controllers in their operative positions,substantially as described.

24:. In a leather-working machine, the combination of a pattern-moldhavinglateral pattern-surfaces, a traversing carriage, knifeblocksslidably fitted in the carriage, cuttingknives mounted on saidknife-blocks and hav.- ing means controllable by the pattern-snrfaces,and means for presenting said knifeblocks in their operative positions,substantially as described.

In a leather-working machine, the combination of a pattern-mold, atraversing carriage, knife-blocks slidably fitted in the carriage,springs for impelling said knife-blocks toward the pattern-mold, meansfor individually retracting the knife-blocks against the pressure oftheir springs, and cutting-knives supported on the knife-blocks andhaving means controllable by the pattern-surfaces of said pattern-mold,substantially as described.

26. In a leather-Working machine, the combination of a pattern-moldprovided with matrix and pattern surfaces and having beveled ends, athin pressure-bar disposed in coperative relation to the matrix-surface,a cutter-carriage, pressure-rolls yieldably mounted on thecutter-carriage and disposed on opposite sides of the pressure-bar andin coperative relation to the matrix-surface, skiving-knives pivotallysupported on said carriage and also disposed on opposite sides of thepressure-bar and in coperative relation to the matrix-surface, andtrimming-knives yieldably mounted on the carriage and having meansarranged to ride against the pattern-surfaces of said pattern-mold,substantially as described.

In Witness whereof I have hereunto set my hand in the presence of twoWitnesses.

HENRY BRUNO MALDEIS.

Witnesses:

II. T. BERNHARD, T. MYNARD.

